of public safety exception before you give himhismirandarights,all that talk of naming him as an enemy combatant, all of that is moot right now. they've gone forward with the official proceedings. >> well, they may have used the public safety exception, and apparently they were using it to question him, and he responded in some way given his medical condition. but certainly now that he has a lawyer, that period, however long it was, is over. and you're right, the enemy combatant thing was a nonstarter from the never going to happen. this is a criminal case in federal court in massachusetts, and that's where it will stay until it's resolved one way or another. >> it's going to take a while. thanks very much, jeffrey. much more on what's going on in this boston investigation coming up here in "the situation room" 0. >>> also, another terror plot released today, new information. canadian authorities announcing the arrest of two men believed to be part of a terror plot to attack a passenger train that may have been heading towards the united states, the plot said to have an alleged connect

-called public safety exception tothemirandarulewhere for some period of time, it's not entirely clear how long, a suspect can be questioned without miranda warnings and that apparently is what's happening here. again, it's complicated somewhat by the fact that we didn't know exactly what tsarnaev's medical condition is and how many questions he can answer. apparently he's answering some questions in writing. so i don't really see lindsey graham's proposal as all that differentwhat's going on now. he seems to suggest a longer process of questioning him, but the obama administration has also committed to some period of questioning. now, this all assumes that he's willing to answer questions. can he always samp simply say it answering questions and there is no way either under enemy combatant rules or in the criminal justice system to force someone to answer questions who doesn't want to answer them. >> the argument i guess is under this limited questioning period before he is formally advised of his miranda rights, he has and right to an attorney, doesn't have to answer any questions. there

are told he had not been givenhismirandarights.do you have any sense of whether he has this morning or how soon it will be before he does receive them? >> the -- the decision not to read miranda rights was made by the federal officials. this is a unique clause to the terrorism law that we've not dealt with at the local level before. so, we are standing by and watching that at this point in time to see how that develops. but, the lawyers are involved in the decision, and certainly we're very anxious to talk to him, and the investigators will be doing that as soon as possible. >> commissioner over the weekend i heard you say you believe you found evidence your offices did you believe that these brothers were planning some kind of another attack, or at least prepared for it. tell us about that. >> the two suspects were armed with handguns at the scene of the shoot-out. and there were multiple explosive devices, including a large one that was similar to the pressure cooker device that was found on boylston street. i saw that with my own eyes. i believe that the only reason that someone